If I held all the thoughts of the world in my hand, I would be careful not to open it.

As astronomy is the daughter of idleness, geometry is the daughter of property.

I detest war; it ruins conversation

Mathematicians are like lovers. Grant a mathematician the least principle, and he will draw from it a consequence which you must also grant him, and from this consequence another.

To be happy, one must have a good stomach and a bad heart.

If I had my hand full of truth, I would take good care how I opened it.

A man finds no sweeter voice in all the world than that which chants his praise.